Final answer to the problem
$-\left(y+3\right)$
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Step-by-step Solution
Specify the solving method
1
Combining like terms $y$ and $-2y$
$-y-3$
2
Factor the polynomial $-y-3$ by it's greatest common factor (GCF): $-1$
$-\left(y+3\right)$
Final answer to the problem
$-\left(y+3\right)$